OP, if you want a reliable and inexpensive setup go with the upgraded turbo; VF39, 43, 48. You can get an STI intercooler (and the splitter and boot), a tune and be done. A fuel pump is a good upgrade for safety, but not necessary. Likewise on the boost controller. Personally, I upgraded both with a walbro 255 fuel pump and the Grimmspeed EBCS.
The meth kit just adds complexity and is one more thing to worry about. They work, but if you are looking for cheap and reliable, go with the VF39/43/48. that's my $.02.
EDIT: Looks like others beat me to it!